thumb|300px|The entrance to Retretti. Retretti was a major art museum in Punkaharju, Finland. It was unique in that most of its exhibition space was underground. The man-made caves total and reach a depth of .
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thumb|300px|The entrance to Retretti. Retretti was a major art museum in Punkaharju, Finland. It was unique in that most of its exhibition space was underground. The man-made caves total and reach a depth of .
There was a souvenir shop and a restaurant in the premises.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).